1-A - Chapter 1 Measurement Chemistry, 5th Edition...

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C h a p t e r Chemistry, 5 th Edition McMurry/Fay 1 Measurement
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2 Measure a centi-deskunit using ribbon and s 1 cdu = ?? Accuracy, Precision, and Significant Figures in Measurement
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3 Accuracy is how close to the true value a given measurement is. Precision is how well a number of independent measurements agree with one another. Accuracy, Precision, and Significant Figures in Measurement
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4 Significant Figures are the total number of digits in the measurement. The results of calculations are only as reliable as the least precise measurement. Rules exist to govern the use of significant figures after the measurements have been made. Accuracy, Precision, and Significant Figures in Measurement
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5 Mass of a Tennis Ball
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6 Reading a Thermometer
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7 Taking a Measurement
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8 Taking a Measurement
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9 Rules for Significant Figures: Zeros in the middle of a number are significant Zeros at the beginning of a number are not significant Zeros at the end of a number and following a period are significant Zeros at the end of a number and before a period may or may not be significant. Accuracy, Precision, and Significant Figures in Measurement
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10 Rules for Rounding Numbers: If the first digit removed is less than 5 - round down If the first digit removed is greater than 5 - round up If the first digit removed is 5 and following numbers are nonzero - round up If the first digit removed is 5 and following numbers are zero - round down Accuracy, Precision, and Significant Figures in Measurement
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11 How many significant figures does each of the
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This note was uploaded on 02/29/2012 for the course CHM 111 taught by Professor Colyer during the Summer '08 term at Wake Forest.

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1-A - Chapter 1 Measurement Chemistry, 5th Edition...

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